Climatological Report (Daily)
Issued by NWS
Issued by NWS
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122
CDUS46 KMTR 180833
CLISJC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
133 AM PDT MON AUG 18 2025
...................................
...THE SAN JOSE AIRPORT CLIMATE SUMMARY FOR AUGUST 17 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1893 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 76 2:48 PM 99 1939 82 -6 85
MINIMUM 61 11:59 PM 44 1893 59 2 63
AVERAGE 69 70 -1 74
PRECIPITATION (IN)
YESTERDAY 0.00 T 1985 0.00 0.00 0.00
MONTH TO DATE 0.00 0.02 -0.02 T
SINCE OCT 1 9.31 13.38 -4.07 17.06
SINCE JAN 1 5.67 9.23 -3.56 13.63
SNOWFALL (IN)
YESTERDAY MM 0.0 1947
MONTH TO DATE T
SINCE JUN 1 T
SINCE JUL 1 T
DEGREE DAYS
HEATING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 24 28 -4 0
SINCE JUL 1 1 4 -3 0
COOLING
YESTERDAY 4 5 -1 9
MONTH TO DATE 86 85 1 131
SINCE JUN 1 215 320 -105 634
SINCE JAN 1 256 371 -115 704
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 8 RESULTANT WIND DIRECTION N (340)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION N (340)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION N (10)
AVERAGE WIND SPEED 9.1
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 81 1:00 AM
LOWEST 50 2:00 PM
AVERAGE 66
..........................................................
THE SAN JOSE AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 82 97 1934
2020
MINIMUM TEMPERATURE (F) 59 44 1916
SUNRISE AND SUNSET
AUGUST 18 2025........SUNRISE 6:27 AM PDT SUNSET 7:55 PM PDT
AUGUST 19 2025........SUNRISE 6:28 AM PDT SUNSET 7:54 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$